In PS i placed the pic of the planet, lining up with the poles but leaving some space. I tiled it a bit and used the clone tool to keep it more random. Changed the hues to a more alien color, added some snow and created a bump.
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I used each source to create pieces of metal. I used the PS filters available and tried to keep a grungy, non-brandnew, look to them. I played around with many filters and distortion. Once I had them placed I changed the contrast to make them darker and less shiney looking. Here you can see how they were placed on the map, and how they all look dark and blended together. I kept the shiney blue engine metal bright and scratchy to give more of a glow, since the engines would be on.
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Just a simple star background. Black with random dots I placed by hand then tiled. It is used as an opacity map in 3ds.
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In 3ds i added a directional light for the sun, but I did not have it light up the windows, lights, stars or atmosphere.
I used each an omni light for the stars, lights, windows and atmosphere so I could adjust them each as I needed.
Then I used the render effect called glow on each of the items that needed a glow. (Atmosphere, engines, sun, windows, lights)